Obsidian
Obsidian (Volcanic Glass)
Category
Browse synthetic glass (often categorized as a simulated mineral) specimens identified by the Rock Identifier community.
Obsidian
Obsidian (Volcanic Glass)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Green Quartz / Aventurine
Silicon Dioxide (SiO2) with inclusions
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Quartz Pebble
Silicon Dioxide (SiO2)
Pink Quartz (Inclusion-filled)
Silicon Dioxide (SiO2)
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Quartz (Milky Quartz/Citrine Type)
Silicon Dioxide (SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Massive Quartz (Milky or Gray)
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with inclusions of Dumortierite or similar minerals
Green Slag Glass (Cullet)
Amorphous Silica (Industrial Glass Byproduct)
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion (SiO2 + Fe2O3)
Sandstone (Quartzose Pebble)
Clastic Sedimentary Rock (Litharenite/Quartz arenite)
Sandstone
Arenite (primarily SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Quartz pebble
Silicon Dioxide (SiO2)
Fluorite (Green Fluorite)
Fluorite (Calcium Fluoride, CaF2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within a metamorphic matrix
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
Sandstone (Quartzose)
Arenite (SiO2 based)
White Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Citrine
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Jasper (Iron-stained)
Silicon Dioxide (SiO2) with iron oxide inclusions
Tumbled Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Quartz Vein in Schist
Quartz (SiO2) in Mica Schist
Cullet (Slag Glass)
Amorphous Silica (SiO2) with various metal oxide colorants
White Quartz Pebble
Silicon Dioxide (SiO2)
River Quartz Pitting/Cobble
Silicon Dioxide (SiO2)
Chert (Mudstone)
Microcrystalline Quartz (SiO2)
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen